<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="stylesheet" href="test6.css">
</head>

<body>
    <div class="parent">
        <div class="div1 item"> 1 </div>
        <div class="div2 item"> 2</div>
        <div class="div3 item"> 3</div>
        <div class="div4 item"> 4</div>
    </div>
</body>

</html>